Comparator with transition threshold tracking capability
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United States of America Patent
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Nov 12, 2013
Grant Date -
Aug 8, 2013
app pub date -
Sep 12, 2012
filing date -
Feb 8, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A comparator is provided. The comparator includes a voltage generator, a buffer unit and a threshold control loop. The voltage generator has an output terminal for providing a reference voltage according to a constant current. The buffer unit provides an output signal according to a first input signal and a bias signal. The threshold control loop provides the bias signal to the buffer unit according to a second input signal, so as to regulate a transition threshold of the buffer unit to close to the second input signal. The output signal represents a compare result of the first and second input signals. The buffer unit and the threshold control loop are powered by the reference voltage.
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